Read Harman Kardon HK 990 Service Manual online
-20VA
+20VA
R31
220R
220R
R63
100R
100R
C77
100nF
100nF
R61
2K7
2K7
C57
100nF
100nF
C37
100nF
100nF
-
+
2
1
3
4
D7
GBU806
GBU806
R28
220R
220R
D2
30BQ040PbF
30BQ040PbF
R55
100R
100R
-
+
2
1
3
4
D6
GBU806
GBU806
C27
100nF
100nF
R30
2K4
2K4
ADJ
1
VIN
2
VOUT
3
U9
LM337T-ADJ
R37
2K4
2K4
C81
100nF
100nF
D4
30BQ040PbF
VIN
3
ADJ
1
VOUT
2
U6
LM317T-ADJ
C51
100nF
R54
2K7
2K7
-15VA
+15VA
+5V
+3.3V
Chassis screwed transformer
0.5A
15.5V
Low-ESR
Low-ESR
C72
4.7mF/16V
C63
4.7mF/16V
C71
4.7mF/25V
C62
4.7mF/25V
Q7
TIP32C
Q2
TIP31C
TERMINAL ERTH
E
TERMINAL ERTH
E
C50
470uF/35V
C54
470uF/35V
C45
10uF/50V
C55
10uF/50V
C30
10uF/50V
C40
10uF/50V
C21
220uF/25V
C33
220uF/25V
1
2
3
4
5
1
3
230V
TO FUSE BOARD
0V
0.5A
15.5V
1.5A
8V
R40
RF0.22R/0.5W
R41
RF0.22R/0.5W
R42
RF0.22R/0.5W
+11v
C82
100nF
C75
100nF
100nF
C32
100nF
C39
220uF/10V
220uF/10V
C35
100nF
C36
220uF/10V
220uF/10V
VIN
1
GND
2
VOUT
3
IC1
L7805CV
ADJ
1
OUT
2
IN
3
IC2
AMS1085CT
C38
10UF/50V
R21
412R/1%
412R/1%
R22
680R/1%
680R/1%
1
2
3
4
5
J11
5P2.5
+VCC
-VSS
111
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